i 1:1 i in. .1-1-. 171 



C, IM i. in 1 1.1 M. G P.. A.I. Pi. 80 



BubcylindrioAl-pupoidal, whork \\ith two .-piral rid---- <>f rather 

 Large nodules, of which the upper one i- larj-er. and i- doubled on 



tlu- lower whorU, anteriorly with two additional ridges, of whieh 

 the upper one is subnodulous ; whorls about II, the lower one a 

 little contracted, tenuinat in-' obtusely; white, with a l>ro\vn hand 

 on the lower spiral row of tubercles. Length, :\^> mill. 



Janm !<, <i mull-loupe, West Indies* 



( . <M \I:AM AM-M, d'< >rb. I M. :!"), fig. 39. 



Shell hrowu, with four spiral rows of somewhat oblique tubercles, 

 base defined by a thread-like ridge. Length, 3 mill. 



Rio Janeiro, BraziL 



-ri.i\]:<,i 1:1, Dall. PL 35, figs. 40, 41. 



Thin, purplish, with white nucleus and columella; nucleus 

 smooth, partly immersed, normal whorls 6, strongly sculptured, 

 rather rounded, sculpture consisting of three spiral series of tuber- 

 clee, separated by rather deep channels, anterior channel bordered 

 by the raised, convex, smooth base. Length, 5'5 mill. 



Alaska. 



Var. TKiX( AIIM, Dall. Fig. 41. 



Xuclear whorls large, of a soft, almost fleshy consistency, break- 

 ing off iii drying. , 



This is probably a pathological condition of the species, as sur- 

 miM'd by Dr. Dall. 



i IM\ \. Carp. PI. 35, fig. 21. 



Purplish brown, with 9 normal, flat whorls, and distinct suture, 

 having a elathrate pattern of nodules formed by the crossing of 

 loiiLritndinal ribs by three spiral ribs, base rounded, spirally ridged. 

 Length <S-5 mill. 



r////ro///vr's /*/. tn Sniit/irrn ('oast of California. 

 Ka-ily reeoo-ni/ed, even in portions, by the 'stnuur-fu:' pattern." 



G PDBPUKEA, Carj). IM. :',.", fi.ir. 4:J. 



I'pper half of whorls In-own, or brownish ])iirple, lower half 

 white or lighter brown, body whorl brown, with a white peripheral 

 band; with three spiral series of nodules, base rounded, with spiral 

 line. Length, 7'"> mill. 



( ''i 



